Piano



FIG. 1 is a perspective view of a piano showing my new design;

FIG. 2 is a right side view thereof;

FIG. 3 is a left side view thereof;

FIG. 4 is a front view thereof; and,

FIG. 5 is a top plan view thereof.

The bottom view is not visible during normal use.

The broken lines show unclaimed subject matter only and form no part of the claimed design. 

CLAIM The ornamental design for a piano, substantially as shown and described. 